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Train 938 is slowing to cut out the helper at Tehachapi Summit on June 20, 1992. The train has engines 5135, 5049, 3689, 3702, 2864, and 5399 on the headend.
At the other end of Summit siding, train PSSE (Extra 9261 East) pulls to a stop on May 16, 1973 to cut out the helpers. The little green light by the spring switch at the end of the siding lets trains running against the current of traffic know that the switch is back to normal. Disk 47